Malicious PDF — malware analysis report

Static analysis result for SHA-256 178338550ac5b3c1…

MALICIOUS

PDF

43.4 KB Created: 2020-08-30 05:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2701873ba423146bd0a4968f572ccc6 SHA-1: fb8a8c2edeefba37df00a84a4f5230c8776ce4c3 SHA-256: 178338550ac5b3c1cfd2e7db7381d3b84b7a000ed1bf5e88c8d303060bb4896f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=the+ways+of+white+folks+pdf', is designed to redirect users to potentially harmful content. The presence of numerous other PDF links suggests a link farm or a method to obscure the malicious destination. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=the+ways+of+white+folks+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/essential_hypertension_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0437/7103/5809/files/53765709494.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/jefojadotobedopivuwoba.pdf
    • https://static.usrfiles.com/ugd/b8c837_1587aea5e0934618be9b5e73dd47a9df.pdf
    • https://static.usrfiles.com/ugd/cc089a_299ad98e4d424e69bffbf6c3bda27901.pdf
    • https://static.usrfiles.com/ugd/9b33c5_9ed85d2acf9443e4af6ac5f2f32e3018.pdf
    • https://static.usrfiles.com/ugd/1d64af_24b959d1d8ec40f1b61bdfe82e091277.pdf
    • https://static.usrfiles.com/ugd/b8c837_bddf7b4514c247c1be2646bd05302187.pdf
    • https://static.usrfiles.com/ugd/ae15ca_f803269edb764d3e8e1de773cf550c58.pdf
    • https://static.usrfiles.com/ugd/b8c837_681d5d5fb3eb4682a5c791d1f1f60db0.pdf
    • https://static.usrfiles.com/ugd/1a89c8_08e8779ff2634743aa3330a4bf5e4eed.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad9eae7bcf3b4f189219a120b63a11f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_39f5b171722548ff9983643edcae0a0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bfe05a77a1b4d5eabd0d05d04a283b4.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a9b.bin
dc0ba9b0b9b1909fd15581d4dd242b591445a3868c9206993f42e5b444210e2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9B 5240 bytes
font_01_sfnt_off00007c8b.bin
e6c5f15cd535f63216af03a2dd6dc1b1119b9638f0753030fd19487889e0229e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8B 10272 bytes